Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
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A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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- Teacher spread
- 0.236 · how far apart the two teachers sit on this one work
- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 10 18 eV, i.e. the region of the all-particle spectrum above the so-called "ankle" feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated through a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies, hard spectra and heavy chemical composition. We also show that uncertainties about physical quantities relevant to UHECR propagation and shower development have a non-negligible impact on the fit results.
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The record
- Venue
- Journal of Cosmology and Astroparticle Physics
- Topic
- Astrophysics and Cosmic Phenomena
- Field
- Physics and Astronomy
- Canadian institutions
- —
- Funders
- Laboratori Nazionali del Gran SassoNuclear PhysicsFP7 People: Marie-Curie ActionsInstitut National de Physique Nucléaire et de Physique des ParticulesAgencia Nacional de Promoción Científica y TecnológicaIstituto Nazionale di Fisica NucleareHelmholtz Alliance for Astroparticle PhysicsUniversidad de GranadaUniversität HamburgUniversidade de LisboaRijksuniversiteit GroningenIstituto Nazionale di AstrofisicaUniversidad Nacional Autónoma de MéxicoUnitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si InovariiFinanciadora de Estudos e ProjetosUniversidad Michoacana de San Nicolás de HidalgoEuropean Regional Development FundCentre National de la Recherche ScientifiqueFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de JaneiroUniversità di CataniaConselho Nacional de Desenvolvimento Científico e TecnológicoMinistero dell’Istruzione, dell’Università e della RicercaMinisterie van Onderwijs, Cultuur en WetenschapDirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de MéxicoConsejo Nacional de Ciencia y TecnologíaYork UniversityRadboud UniversiteitInstituto Politécnico NacionalGrantová Agentura České RepublikyConsejo Nacional de Investigaciones Científicas y TécnicasCentro de Investigación y de Estudios Avanzados del Instituto Politécnico NacionalUniversidade de Santiago de CompostelaComunidad de MadridUniversidad Complutense de MadridStrongCase Western Reserve UniversityXunta de GaliciaOhio State UniversityMichigan Technological UniversityFundação para a Ciência e a TecnologiaColorado School of MinesFundação de Amparo à Pesquisa do Estado de São PauloMinisterio de Economía y CompetitividadBundesministerium für Bildung und ForschungStichting voor Fundamenteel Onderzoek der MaterieInstituto Superior TécnicoNederlandse Organisatie voor Wetenschappelijk OnderzoekDeutsche ForschungsgemeinschaftJavna Agencija za Raziskovalno Dejavnost RSUniversität SiegenUniversitatea din BucureștiInstitut "Jožef Stefan"Colorado State UniversityLouisiana State UniversityUniversità degli Studi di Napoli Federico IIGran Sasso Science InstituteBenemérita Universidad Autónoma de PueblaAgence Nationale de la Recherche
- Keywords
- PhysicsPierre Auger ObservatoryAugerSpectral lineAstrophysicsRigidity (electromagnetism)Energy spectrumObservatoryAtomic physicsAstronomyQuantum mechanics
- Has abstract in OpenAlex
- yes